트랙백 주소 :

JSP is a Java technology that aims at helping developers to dynamically generate web pages that are based on HTML, XML or any different types of documents. The first stable version of JSP specification was JSP 1.2 and then JSP 2.0, JSP 2.1 got released. Now the latest version of JSP is JSP 2.2 specification.

This new version of JSP namely JSP 2.2 is a maintenance release of JSR 245. Earlier JSP 2.1 was released under the specification JSR 245 as part of the Java EE 5. For this JSP 2.1, a maintenance release called JSP 2.2 is released on 10thDecember 2009. This is the latest release of JSP.

Though JSP 2.2 is the latest version update of JSP specification, the JSP 2.1 is the widely used and highly recognized version of JSP. JSP 2.1 is equipped with an Expression Language that gives scope for developers for the velocity style template creation. JSP 2.1 has many other enhancements and bug fixes when compared to JSP 2.0 and other earlier versions.

@acdcjunior the jars are not the best reference here, since a web application server could handle more than one version of servlets thus accepting wars that use old servlet versions. – Luiggi MendozaJun 30 at 7:35